Inchicore Class J10 Conversion From LNER J72

[Colin R]

Hi Eoin. 

When you start to look around, you can find yourself looking at a number of these bits of kit ranging from £500 up to £4,000 pounds.

Thanks for the information about your machine tools, it gives me something to think about.

 

Colin 

[murrayec]

A bit more done on the J10 chassis conversion;-

The cab footplate was soldered onto the chassis and the body fixing brackets were folded up and 10BA captive nuts soldered on.

Brackets fitted.

After scraping the inside of the body where the brackets will be epoxied on I decided to drill holes through the bracket tabs to aid the epoxy gripping the parts. The brackets are fixed to the chassis with some cling film between to stop the chassis getting stuck in the body also!

Chassis in place and bracket tabs epoxied to the body.

Brackets glued in.

Next was to set up some cab details, a cab front plate , a backhead, and the cab side tanks were worked out.

This is a screen capture of the backhead model set up for CNC'ing from a sheet of tufnol. The big gap is for the motor gearbox which protrudes into the cab.

The backhead cut from a 5mm thick sheet, the part is 4mm thick.

Cleaned up and test fitted over the gearbox. Some details will be fitted- these parts are included for, when the front plate and tank parts are being cut. I'm also going to make a mould from this so that the backhead will be cast with white metal, adding weight to the loco......

Eoin.

[murrayec]

A few more bits done on the J10 chassis;-

A tapered flywheel was turned up from a 12mm brass bar.

Flywheel test fitted.

The electrical pickups .3mm NS wire were bent to shape and soldered in, electrical wires were soldered between the two pickup boards with tails threaded up through the chassis.

Testing the continuity of the pickups on the rolling road.

And first side of the backhead white metal mould done......

Eoin

[murrayec]

The backhead white metal casting mould was completed;-

A few castings done.

The top 3 suffered a bit of chill in the mould, after making adjustments to the mould the bottom 3 came out nice n sharp.

Setting up the water gauges, using handrail knobs, .5mm ID tube, and .5mm brass wire.

Setting up some steam equipment with brass box section, .5mm tube, .5mm and .8mm brass wire.

Soldered up.

Cab parts cut from .35mm NS sheet.

A bit of processing to be done..........

Eoin

 

[murphaph]

Another work of art in the making!

Why does the flywheel need tapering Eoin? Just so it fits inside the body?

[murrayec]

3 hours ago, murphaph said:

........Why does the flywheel need tapering Eoin? Just so it fits inside the body?

A flywheel works best with as much of it's overall weight running on the periphery, tapering out to the periphery does that- more weight on the outside gives more centrifugal force which smooths everything out.

Eoin

 

[murphaph]

7 hours ago, murrayec said:

A flywheel works best with as much of it's overall weight running on the periphery, tapering out to the periphery does that- more weight on the outside gives more centrifugal force which smooths everything out.

Eoin

 

Oh that's interesting. I never knew that!

[murrayec]

Cab parts are now finished on the J10;-

Parts cleaned up and ready for folding and soldering- cab front, side tanks, regulator handle, teapot shelf, and top gauges n steam cock stand.

Front plate and side tanks folded and soldered.

Assembly soldered to the cab floor after checking it all fits into the body. I'm not to worried about the wheels in the cab- they will be hard to see with the side tanks obscuring the view!

Backhead parts complete and test fitted, the backhead will be painted but I'm going to leave the fittings in brass finish.

Next step is paint.......

Eoin

[2996 Victor]

Just caught up with this, Eoin, and can I say, "Wow!" Incredible workmanship all the way through, but the additional detail you've added with the replacement chassis and in the cab is exquisite.

I could be tempted to follow in your footsteps, but only as far as the original build - the replacements are beyond my skills!

Looking forward to seeing the completed locomotive.

Cheers,

Mark

[2996 Victor]

On 2/5/2017 at 7:10 AM, Mayner said:

The Mainline J72 was the nearest thing to an "Official" RTR conversion for the small Midland E Class 0-6-0 tanks or CIE J26 Class. The late Alec Phillips a very talented modeller pioneered the conversion of the J72 into an E Class after struggling to get the early TMD E Class to run.

Apologies, Eoin, for thread hijack, but John could you possibly suggest whether Alec's J72 conversion was ever documented?

Cheers,

Mark

[Joe Keegan]

2 hours ago, 2996 Victor said:

Apologies, Eoin, for thread hijack, but John could you possibly suggest whether Alec's J72 conversion was ever documented?

Cheers,

Mark

The late Alec Phillips former member of the MRSI passed away in the 1980’s.

Back then Alec would you showed/explain to you on how to do the conversion but unfortunately it was never documented. 
 

Alec’s pride & joy was his scratch built GNRi 4-4-0  accompanied him on his heavenly journey.

Edited April 30, 2022 by Joe Keegan

[2996 Victor]

7 hours ago, Joe Keegan said:

The late Alec Phillips former member of the MRSI passed away in the 1980’s.

Back then Alec would you showed/explain to you on how to do the conversion but unfortunately it was never documented. 
 

Alec’s pride & joy was his scratch built GNRi 4-4-0  accompanied him on his heavenly journey.

Thanks Joe, that's greatly appreciated.

Best regards,

Mark

[Mayner]

Eoin's thread is an excellent step by step in converting the Mainline/Bachmann J72 into a MGWR E GSR/CIE 551/J26 Class.

Although the MGWR large and small tanks are similar in general appearance the J72 is closer in size and general proportions to the E/551/J26 Class than the P/610/J10 Class which were larger locos.

The new Bachmann model is probably the best option for a OO model, but the SSM kit or a scratchbuild are likely to be the only workable options for a 21mm gauge model, in my experience clearance between crankpins and valences is very tight in 21mm gauge with the SSM kit.

 

[David Holman]

Somehow been missing the last few posts, so off to write out 'must pay more attention' 100 times.

 Just sublime. 

[murrayec]

The chassis is eventually painted;-

Parts being sandblasted.

Everything ready to start a painting.

Etch primed & under-coated.

Top grey coat & lacquered.

The backhead was painted satin black, then the brass fittings were epoxied on and finished with a coat of lacquer.

Final assembly to come soon.......

Eoin.

[David Holman]

As always, a joy to behold.

[murrayec]

On the final stretch now!

After assembling the chassis and giving it a test run to adjust the coupling rods the driver and fireman turned up to lend a hand.

After checking the fit of the fireman he was then epoxied onto the body-to-chassis fixing bracket, a LED cab light was also fitted. A bit of masking tape is placed over the LED to dull and yellow the light.

 

About 100 grams of lead weight was chopped up- sized to fit on the inside of the body. The main weight being centred over the back axles.

Weight epoxied in.

The final problem- fitting the chip and wiring in there somehow..........

I did have a video of the loco running on the test track but my phone's memory card had a bit of a melt down and it was lost, along with other stuff ''Backup you phones''

Eoin.

[2996 Victor]

5 minutes ago, murrayec said:

On the final stretch now!

After assembling the chassis and giving it a test run to adjust the coupling rods the driver and fireman turned up to lend a hand.

After checking the fit of the fireman he was then epoxied onto the body-to-chassis fixing bracket, a LED cab light was also fitted. A bit of masking tape is placed over the LED to dull and yellow the light.

 

About 100 grams of lead weight was chopped up- sized to fit on the inside of the body. The main weight being centred over the back axles.

Weight epoxied in.

The final problem- fitting the chip and wiring in there somehow........

Phenomenal! Absolutely amazing modelling!

Cheers,

Mark 

[Galteemore]

Excellent stuff. Lovely workmanship. And I had no idea that Inchicore had adopted the mechanical stoker firebox screw feed that other much larger railway companies had used  

Edited August 29, 2022 by Galteemore

[murrayec]

17 minutes ago, Galteemore said:

............And I had no idea that Inchicore had adopted the mechanical stoker firebox screw feed that other much larger railway companies had used  

I think it's going to be an oil squirter too, better make a shroud for it or it will mess up the backhead controls!

Eoin.

[David Holman]

Love how all the weights have been cut and fitted - must have another look at some of my Clogher locos!

[murrayec]

I eventually came up with a plan for the chip location, as seen above. The body can be disconnected from the chassis by mini connectors if needed.

With the body on and those crank-pins trimmed it ran fine on the test track.  This completes the chassis build- eventually!

I will take some video on it's home layout and post it up here when done

Complete!

Eoin

[Tullygrainey]

Reading about this build has been a real pleasure and truly inspirational. And what a wonderful finished model. Exceptional! I've learnt a lot. Thank you Eoin

Alan

[David Holman]

Quart into pint pot epitomised!

[Closet modeller]

Extraordinary and attractive model.   The backhead details are a joy, especially with interior light. And she runs well, too.

[murrayec]

A short video of J10 running on the Greystones Layout;-

Eoin